87044471077 has 2 divisors, whose sum is σ = 87044471078. Its totient is φ = 87044471076.

The previous prime is 87044471071. The next prime is 87044471099. The reversal of 87044471077 is 77017444078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83702590596 + 3341880481 = 289314^2 + 57809^2 .

It is a cyclic number.

It is not a de Polignac number, because 87044471077 - 2²⁷ = 86910253349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87044471077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87044471071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43522235538 + 43522235539.

It is an arithmetic number, because the mean of its divisors is an integer number (43522235539).

Almost surely, 2^87044471077 is an apocalyptic number.

It is an amenable number.

87044471077 is a deficient number, since it is larger than the sum of its proper divisors (1).

87044471077 is an equidigital number, since it uses as much as digits as its factorization.

87044471077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1229312, while the sum is 49.

The spelling of 87044471077 in words is "eighty-seven billion, forty-four million, four hundred seventy-one thousand, seventy-seven".